Lock



May 19, 1925. 1,538,283

A. GERTSFELD LOCK Filed May 6. 1924 Geiffifazd/ f i Snow/tor.

Patented May 19, "1 925.

UNITED STATES ABRAHAM GER'ISFELD, OF NEXV YORK, N. Y.

- LOCK.

App1icetion filed May 6,

To all whom 2'15 may concern:

Be it known that I, Asian-11M GER'ISFELD, a citizen of the United tita'tes, and resident of the city of New York, in the county of the Bronx and State of New York, .haveinvented certain new and useful Improvements in L CliS, of which the following is a specificetion. I

This invention relates to a door "lock, or a lock suitable for other uses, :and has for its object to provide a device of this character which will be of strong and sturdy construction, and which will he so inadeas to prevent it from readily being broken open.

Reiierence is to be had to the accompanying drawing, forming a part hereof, in which-- p Figure 1 is a rear elevation of a lock made in accordance with my invention, parts being shown in section, and the rear cover plate being removed, to disclose the interior construction of the look; 7

Figure'i is a longitudinal cross sectional view, showing the complete lock and the keeper therefor, the same appear when attached to a door and door frame, respectively, and v Figure 3 is a view, showing the manner in which the interior 111661111111S1ll0fthBlOCk acts to shiftthe bolts. I

Throughout the various views of the drawing, similar reference characters designate similar parts.

In the preferred embodiment of my in vention, as disclosed in the accompanying drawing, 1 provide a lockcasing 1 which contains the lock mechanism. 'lhis casing 1 is provided with the customary edge flange 10. From one of, the ends oi'- the casing is provided an extension or PLOJGCiJIOn 33,

Y which is preferably integrallyft'ormed with the casing, and this extension is provided with a pair of laterally projecting'portions or wings 34- and 35 which form an integral part of the extension. Theoasingiextension thus provided, consisting 01 1116 parts 33, 3d and 35, is generally T-shaped and when the lock is closed said T-sheped part isarr-anged to lie in a corresponding opening in'the iloclo keeper 9 which is secured to the-door frame 40, as will be hereinaftersetforth;

The keeper 9 consists of angle plate which fits over and is secured .to the door frame, a portion of whichis indicated at 40, and said keeper is provided with a box portion terminates in a slot 15.

1924. Serial No. 711,324.

or frame having a wall 2, ends 3 and 1- and inwardly extending portions 5 and 6. A continuous'wal-l composed of the parts 2, 3, at, 5 and 6 is provided which conforms to and accommodates the T-shapeiil exten sion on the lock casing and bolt. holes 7 and 8 extend through the portions or wa ls oi" the lieeper which lie on opposite sides of the wings and 35 of the T-shaped extension. I i The wings 34 and 35 are provided'vith corresponding bolt openings so that when the extension lies within the he per, its oolt openings are in alignment with the bolt openings 7 and S i-n'the keeper so that bolts 12 and 13 when projected out oi the can ing pass through the bolt openings in the extension 33 and also through the bolt openings 7 end'S in the keeper. 7

The bolts 12 and 13 are secured to, or form an integral part of a plate 11 which is located within the casing and is movable therein to drew said bolts within the casing or shift the same out of the casing and through the respective bolt openings in the casing extension 33 and in the keeper,

The plate'll is provided with slot 16 extending longitudinally and .a guide pin or stud 17 projects from the inner i ace of the casing end into said slot and restrivis the movement of the plate 11. 1

At 21 is shown a tumbler plate orloclting plat-e which'is provided-with an ear or lug 23 pivoted on a stud 24 projecting from the casing. This plate 2-1 is provided with an elongated slot 25 which extends longitudinally of-the plate,-and extending laterally from the ends oi. said slot 25 are slots 26 and 27 in which a studQS projecting from the plate 11 adapted to fit.

A fiat spring 29 projects front-the upper edge of the plate'Ql and bears against the upper flange 10 of the casing. Forthe purpose of shifting the plate 11, I provide the usual manually operated knob 32 which projects from the inner side of the lock and is secured to a boss 18 within the casing from which extends a finger 19.

The plate 11 1s cut awayues at 14 to provide -s converging groove in whichthe finger 19 operates and the end of said groov 14L its closed position, it will be seen that the bolts 12 and 13 are projected out of the easing and they pass through the bolt openings 7 and 8 in the walls of the keeper and they When the icon is in i also extend through the openings provided for them in the extensions 3-1- and 35 on the casing projection. To withdraw said bolts 12 and 13 within the casing to open the lock the knob is rotater, swinging the linger 1.9 as shown in Figure 3, which causes it to ride on the curved underlace 22 of the tumbler plate 21, lifting said plate against the tension of its spring 29 and raising the lateral slot 27 :l'rom oil of the stud 28 on the plate 11.

As the knob 32 is rotated further, the end of the finger 1'9 enters the slot 15 in the plate 11 and shifts said nate and during such shitting movement, the stud 28 is moved along through the longitudinal slot 25 (see Figure 3 and this continues until the bolts 12 and 123 are drawn into the casing so that the door 39 may be swung open.

When the bolts reach the limit of their inward movement, the stop 1'? has reached the end of its guide-slot 1" and the finger 19 has moved out of the slot 15 and has ceased its lifting movement of the plate 21 permitting said plate to descend under the pressure of the s nine 29 so that its lateral slot 26 rests over the stud 28, holding: the bolts within the casing and the lock in its open position.

The above describes the manner in which the lock is manually operated -from the inside and the same is operated similarly from the outside by a key which enters the ordinary key lock 36 located on the opposite side of the door 39. This lock 86 is held in place by suitable screws 37 which extend through a reinforcingplate 38 on the back "face of the door within the lock casing. The key loo 1 36 when operated by its key rotates a stem 20 which projects into the boss 18 on which the operating finger 19 is formed.

In Figure 1 I have shown the closure plate 82 removed for the purpose of disclosing the lock mechanism. Said plate 32 is shown in llip'ure 2 where it. will be seen that the same is hold in place, closing the back of the casing and confining;- the mechanism in the casing. by means of screws which enter into studs 30 and 31 provided in the casing for their reception.

It will be seen from th foregoing that the construction of my improved lock is such, with its bolts 12 and 13 projecting through the keeper and through the casing extension that it is impossible to insert a tool or other article under the ends of said bolts to thrust the same back ano surreptitiously open the lock.

From the foregoing, it is obvious that my invention is notto be restricted to the exact embodiment shown, but is broad enough to cover all structures coming within the scope of the annexed claims.

hat I claim is 1. A lock having a pair of bolts, an extension projecting from the lock between the bolts, said extension havinglateral projecs tions at its end extending in trout oi the bolts and provided with bolt openings through which said bolts may projest, a. keeper having portions adapted to lie on both sides of said lateral portions of the lock andhaving portions adapted to extend around the ends thereof, said keeper being; provided with bolt openings located on both sides of said lateral portions, said bolt openings being located in alignment with the bolt openings in said lateral portions and adapted to receive the bolts when the same are projected out of the lock.

2. A device of the class described coni prising a. casing, a movable plate therein, a pair of bolt members connected to said plate and adapted to be moved into the casing or shifted outside of the same, a lock ing plate by means of which said boltcarr ving plate is held in its advanced or retarded position, a projection extending from one end of said casing between the bolts, said projection having laterally extending portions at its outer end located in front of the bolts and provided with bolt openings through which said bolts may project, a keeper having portions adapted to lie on three sides of said laterallv ext-ending portions on the projection and also enclose the ends thereof and engage with the bolts on both sides of said laterally extending portions, said keeper being provided with bolt openings located in alignment with the bolt openings in said laterally extending portions and adapted to receive the bolts.

3. A device of the class described conrprisinga lock casing having: an integrally formed T-shaped projecting end. a keeper having a continuous wall provided with portions which are located on opposite sides of parts of said projecting end when the lock is closed, a pair of bolts adapted to more into and out of the casing, said bolts being located on opposite sides of a portion of the projecting end of the casingmechanism for shifting said bolts, said projecting end being provided with openings through which said bolts extend when the same projected out of the casing, and the keeper being provided with bolt openings in its walls on opposite sides of parts of the extension to receive the bolts which pass through the extension.

Signed this 29th day of March, A. D. 1924:.

ABRAHAM GERTS FELT).

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